 | | Report (issue) | | SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time on a small...pegmatites 2.1.1.1 Witkop pegmatite 2.1.1.2 White City pegmatite 2.1.1.3 Homestead pegmatite 2.1.1.4 Lepidolite...Lepidolite pegmatite 2.1.2 Sandfontein - Ramansdrift pegmatites 2 1 3 Aukam-Heigums pegmatites 2.2 Rare metal |  | | Book | | Twyfelfontein 7 AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree ...station Garub near Aus Nature conservation, Erongo 16 Welwitschia, Goboboseb Mountains 17 ....Minerallocalities The North TsumebSpecial The Otavi Mountainland The Central Northern to Northwest Region including...Namib Desertand Escarpment The Spitzkoppen The Erongo Mountains The RossingMountains The Central Escarpment-...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275 |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in Namibia, as elsewhere. has changed from serendipitous discoveries |  | | Journal (article/letter/editorial) | | Lamujärvi, and Iivaara), rapakivi granite and pegmatite (Kovela), and kaolin-bearing weathering crusts...vanadium mine. For several years, Rare Element (RE)-pegmatite of the Kaustinen and Somero–Tammela areas has...Geological Survey of Finland (GTK). At Kaustinen, Li-pegmatite occurs as subparallel dyke swarms in an area of...Paleoproterozoic mica schists and metavolcanic rocks. Li pegmatite contains more than 10% spodumene as megacrysts...The Kaustinen spodumene pegmatite and Somero–Tammela petalite–spodumene pegmatite contain potential Li resources |  | Martins, T., Lima, A., Simmons, W. B., Falster, A. U., Noronha, F. (2011) GEOCHEMICAL FRACTIONATION OF Nb-Ta OXIDES IN Li-BEARING PEGMATITES FROM THE BARROSO-ALVAO PEGMATITE FIELD, NORTHERN PORTUGAL. The Canadian Mineralogist, 49 (3) 777-791 doi:10.3749/canmin.49.3.777 | Journal (article/letter/editorial) | | Li-BEARING PEGMATITES FROM THE BARROSO–ALVÃO PEGMATITE FIELD, NORTHERN PORTUGAL Tânia MARTINS§ Geology...Portugal Abstract The Barroso–Alvão granitic pegmatite field, located in northern Portugal, is known...especially spodumene- and petalite-bearing bodies. Recent work on this pegmatite field characterized other...spodumene pegmatites, petalite pegmatites, and lepidolite pegmatites. In the petalite and lepidolite pegmatites...Keywords: columbite-group minerals, Nb–Ta oxides, pegmatite, fractionation, lithium, Barroso–Alvão, Portugal |  | | Journal (article/letter/editorial) | | Box 530, El-Maadi, Cairo, Egypt Abstract The pegmatite province of the Southeastern Desert (SED) is part...metasomatism, greisenization and tourmalinization. The pegmatite-generating granites are metaluminous, showing...oxides, Sn-oxides (cassiterite), Li-silicates (petalite, spodumene, euctyptite, and pollucite), Li-phosphates...Pollucite is typically associated with spodumene, petalite, amblygonite, quartz, and feldspar. Primary pollucite...pegmatites. This progression suggests that the pegmatite types are related by a common differentiation |  | | Book | | the same passion for minerals and the NE Bavarian region. The Oberpfalz was his home and my adopted country...the principal techniques of deep geophysics, this region enables us to look at the origin of pegmatites...quartz at the core of the pegmatite is concerned. In comparison with other pegmatite deposits in the area...area, however, the Hagendorf-Pleystein Pegmatite Province (HPPP) is not only the largest concentration of...everything has been told about this prominent pegmatite. Professor Strunz was a generous and open-minded |  | | Journal (issue) | | CH. Winter Branch Chairmen Midlands: J.W. Porter North West: 1. Knight Examiners A.J. Allnutt, MSc., Ph...responsible for optical effects are described. As yet the region has not yielded a corundum crystal large enough...plant matter or dead animals can penetrate this region (Gubelin, 1987) unless forced by some external...intruded sand grain which somehow had penetrated the region between the shell and the shellbuilding ectoderm...been produced since 1976 from the Chuncheon area, north east of Seoul, in the Province of Kangwondo, which |  | | Journal (article/letter/editorial) | | deposits by Tissot and Welte (1978), Hunt (1979), North (1985), Selley (1997) and Gluyas and Swarbrick (2004)...Periclase Perovskite (dysanalyte (Nb), knopite (Ce)) Petalite Petzite Pezzottaite Phenakite Phillipsite-(K)...elbaite, dravite, schoerl, achroite Tremolite Triphylite Triplite Troillite Trona Tsumgallite Tugtupite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...biotite, perovskite, apatite, calcite, and oxides. Pegmatite is a very coarse-grained igneous rock with a grain | | | Journal (article/letter/editorial) | | deposits by Tissot and Welte (1978), Hunt (1979), North (1985), Selley (1997) and Gluyas and Swarbrick (2004)...Periclase Perovskite (dysanalyte (Nb), knopite (Ce)) Petalite Petzite Pezzottaite Phenakite Phillipsite-(K)...elbaite, dravite, schoerl, achroite Tremolite Triphylite Triplite Troillite Trona Tsumgallite Tugtupite...the Alpine region, and (3) Mid-Triassic to early Jurassic extension in the extra-Alpine region. Isotope...biotite, perovskite, apatite, calcite, and oxides. Pegmatite is a very coarse-grained igneous rock with a grain |  | | Book (volume) | | at the main coal deposits and occurrence of the North Afghanistan Basin. Table 7 Distribution of coal...13 Water yield of Quaternary aquifers from the North Afghanistan Artesian Basin. Table 14 Water yield...Quaternary aquifers in the South Afghanistan Artesian Region. Table 20 General characteristics of mineral...only generally considered by many authors (114, 115, 138, 139, 152, 153). The first attempt to summarize...distribution patterns of the fields of rare-metal pegmatite. (122-128, 26) deposits and occurrences of tin |  | | Book | | DEPOSIT The discovery of the Outokumpu copper ore in North Karelia was an epoch-making achievement in the history...directions of glacial striations on outcrops. In North Karelia, there existed two directions: 105–113°...quartzite,” that was found in several places in North Karelia. Trüstedt studied in detail the Kalevian...Kalevian quartzite formations in Liperi and Rääkkylä, north and northwest of Kivisalmi. In some cases the rock...The Outokumpu deposit was discovered, about 50 km north-northwest of the original Kivisalmi boulder. Nearly |
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